matplotlib绘制动态正弦曲线

import numpy as np
import matplotlib.pyplot as plt
from matplotlib.animation import FuncAnimation
fig=plt.figure()
ax=fig.subplots()
 
t=np.linspace(0,10,100)
y=np.sin(t)
ax.set_aspect(3)
ax.plot(t,y,'--',c='gray')
line=ax.plot(t,y,c='red')
 
def update(i):#帧更新函数
    global t  #直接用全局变量，也可以通过frames设置
    t+=0.2
    y=np.sin(t)
    line[0].set_ydata(y)
    return line
 
ani=FuncAnimation(fig=fig,func=update,interval=100)
ani.save('正弦曲线.gif')
 
plt.show()